Subgrade scraping machine



Feb. 14, 1933. E. G. CARR SUBGRADE SCRAPING MACHINE Filed Sept. 14, 1951 2 Sheets-$heet l wm/G. Cm

k Fm

Feb. 14, 1933. E. q; CARR 1,897,790

SUBGRADE SCRAPING MACHINE Filed Sept. 14, 1931 2 Sheets-Sheet 2 fmverz 552*.-

Patented Feb. 14, 1933 i i i UNITED STATES ATENT FFiCE EDWARD G. CARR, OF CHICAGO, ILLINOIQ, ASSIGNOR TO CELETA LEWIS CARE, OF

CHICAGO, ILLINOIS I SUBGRADE SCRAPING MACHINE Application filed September 14, 1931. Serial No. 562,760.

The machine herein described is of the bodying the invention resting on side forms general type which runs on forms or side or guide rails; rails set to a predetermined grade and limit- Figure 2 is a front elevation of the machine ing the edge of a concrete road to be laid, in Fi ure 1 in the same position;

and is for cutting away the earth between Figure 3 is an elevation of the machine such'side rails to a proper depth and con resting on its turntable, certain parts being tour to form a mould in which to cast a conremoved for the sake of facilitating illustracrete slab for the roadway defined by said tion, the figure being on line 33 of Figure 1; forms or side rails. Figure 4 is an elevation of the machine 19 The machine spans a road when in workresting on its transportation wheels, certain ing position and is on supporting rollers parts removed for the sake of clarifying which run on the guide rails or forms. The illustration, the figure being on line44 of rollers are suited only to be utilized in mov- Figure 1 ing the machine on the rails or forms. As Figure 5 is a detail of one of the machine 15 the machine when at work is pulled sideways, supporting rollers with offset shaft, lever, its length spanning the whole of a roadway, quadrant and latch, the figure being taken on it is necessary to turn it endways in a roadline 5-5 of Figure 4; way in order to let trucks, rollers, or tractors Figure 6 is a detail of the turntable ,shaf

pass. It is likewise advantageous in transtaken on the line 66 of Figure 1; and p 20 porting a machine from place to place that it Figure 7 is a detail of a cutting blade taken be pulled endways in order to pass other ve- 0n the line 77 of Figure 1. hicles on the road. It is also advantageous to Reference should now be had to the said be able to turn the machine completely drawings which accompany this specificaaround and to set it down again on the same tion, and which form a part thereof, and in 25 guide rails to take a second cut over the surwhich like reference numbers are used to desface previously travelled ver, lgnate the same parts wherever they may ap- In th a t, crap bl d hav been adpear in the specification and in each of the justed by sliding them on vertical or on slop- VleWS. I I I ing plates with their top edge attached The number 8 is used to designate forms 30 i t. th lat Thi arrangement has left or side rails limiting and defining the sides a seam or angle where the blade is attached Of aproposed concrete road. Wheels or rollto the plate which would start the accumula- 8 9 re adapted to move on the rails 8 and 1 1 11 f ti ky at rial ll t d f th support the subgrade scraping 1nachine,there n di t di l d b th hi hi h i t being on said nachineottset or crank axles feres with the rolling of the earth as pushed 10 on Whlch 531d Wheels 9 rotate- Each 3X16 up and back along the blade. This arrange- 10 Passes through pl f 11 and 2- The 1 ment also does not permit of reversing the of the axle Which Is ]ournalled n the plates blade without changing its vertical position. 515 5 a s s fi gg g gggf The plesent mventlon lelates to and has Secured to each axle 10 is a hand lever 13 which has a spring actuated pin 14 engaging holes in the plate 11 so that when the axle '10 is rotated by the hand lever 13there will be a relative vertical movement between the roll- 5 The embodiment of the invention here 9 and the frame of the machine The pin illustrated 1s shewi on a subgrade scraper 14 when inserted in one of the h l in the 5111111511 to that (1150105951 111 y P h plate 11 will hold the wheel 9 in a selected issue Number 15,615. In the accompanying dj t d iti a I two Sheet Of r wings: The frame of the machine consists princi- 50 Figure 1 is a plan view of a machine empally of three suitable cross members 15 with H for its objects an improved mechanism for raising, turning, and transporting such a machine, and'an improved blade and blade holder adjusting mechanism.

end members and suitable bracing which support angles 16 slotted to receive the blade bolts 17 used to hold scraper blades 18 to a saddle 19 in adjustable position on the angles 16. Near the center of the machine, journalled. through a cross member 20, is a vertical shaft 21 with a shoe 22 secured to its lower end and with its upper end turned to receive a lug 23. The lug 23 is free to turn on; shaft 21 and is held thereon by washer and pin or by other suitable means.

A rocking beam 24 engages the lug 23 and is secured to the frame by a link 25 and to apin 26 in a gear 27 by link 28. The gear 27 is keyed to a shaft 29'whi chis journalled on the frame. The gear 27 meshes with a: gear 30, which is keyed on a. shaft 31 and. is journailed on the frame.

A gear 32. is keyed. to the shaft 31: and meshes with a gear 33, the latter bein keyed to a. hand crank shaft 34. Keyed to the shaft 29" is a gear 35 which meshes with a gear segment 36, wh ch is welded or keyed toa crank axle 37. The center of the crank axle 37' is journalled to the frame near. its center, the ends of the axle being offset so as to give relative vertical movement to the wheefs 38 when the axle 37 is rotated.

The gear 36 has a pin 39 to which are attached arched links 40. To the latter are attached coil springs 41, the other end of the springs being attached to an end member of the frame. The pitch diameter of gear 36 is approximately twice that of the gear 35.

It is now obvious that when the cha n of gears is rotated by the hand. crank shaft 34, the gear 27 will bring the pin 26 to the positionshown in Figure 3 with one-half revolution of the shaft 29. In this position, the shoe 22 will be pushed down until it engages the ground, whereupon the rollers 9 will be raised clear ofthe forms 8. In this posit on the machine may be easily revolved on the turntable shoe 22 with the wheels 38 in close proximity to the ground so that should the machine tip sideways by uneven sinking of the shoe 22, one of the wheels 38 would engage the ground and step further tipping without interfering with the rotation of the frame ontheturntable shoe 22.

By further rotation of the chain of gears. thepin 26 will be brought back to its original position shown in Figure 2, while wheels 38 will be brought to the position shown in Figure 4, raising the machine to a suitable positionto be transported on the wheels 38.

I have provided a tractor pole 4-2 which slides in the frame and may be extended outwardly when desired and held in position by a pin 43. By attaching a tractor to this pole. the machine may be moved from place to place, pulled off to one side of the road or brought back up into the center of the road where work is to be done. Then. by reversing the direction of the chain of gears. the machine can be let down onto the turntable shoe 22, the tractor disconnected from the pole 42, and the machine swung around into the POSEtlOIl shown in Figure 3 so that further rotation of the chain of gears would set the machine down on the side rails or forms and raise the turntable clear of the ground.

It will be noted that. I have placed the turntable shoe 22 behind diagonal cutter blades on the machine so that the ground under the shoewoul'dl generally be. l'evel with the bottom of the cutter blades.

To the frame is secured cable or chain shackles Mesothat the machine may be pulled along the roadway by a tractor or any suitable means.

It will be noted that when the gear 36 is in the position shown. in Figure 2 the coil springs tl will be extended. When the gear 36 is revolved in the direction shown by the arrows in Figure 3, the pin 39- will come above the center of the crank axle 37 whereby the pull of the springs-will aid in the further turning of the chain of gears, counterbalancing the weight of the machine whether on the. turntable shoe 22 or the wheels 38.

It will be further noted that I have pro vided' the link 25 with a plurality of holes where it engages the rocking beam 2 950 that different vertical relative positions can be had between the shoe 22 and the wheels 38'.

I have also provided the rocking beam 24: with a plurality of. holes lengthening or shortening that portion of the beam between the lug 23 and the link 25v whereby the relative speed of motion may be varied between the shaft 21 and the wheels 38.

What is claimed as new is:

1. The combination in a: subgrade scraping machine of a frame supporting cutting blades, rollers supporting the frame on guide rails, transportation wheels near the center of the frame, a turntable shoe near the center of the frame, a single means for operating in unison the transportation wheels and the turntable shoe, and springs for aiding in the lifting of the frame, said operating means being adapted to lower the transportation wheels while lifting the machine on the turntable shoe, and lifting the turntable shoe while elevating the machineon the transportation wheels.

Thecombination in a subgrad'escraping machine ofa frame supporting cutting blades, rollers supporting the frame on guide rails. transportation wheel's near the center of the frame, a turntable shoe nearthe center of the frame, a single means for operatingv in unison the transportation wheels and the turntable shoe, said operating means being adapted to lower the transportation wheels while lifting the machine on. the turntable shoe, and lifting the turntable shoe while elevating the machine on the transportation wheels.

3. The combination in a subgradescraping machine having wheels for riding on forms,

of transportation wheels, a turntable support. and unitary means to first elevate the machine on said turntable support, to next bring the transportation wheels into useful position, and to next lift the turntable support from the ground.

4. The combination in a subgrade scraping machine having form engaging members, transportation wheels, and a turntable support, of means for operating said wheels and support and adapted to lower said turntable support and auxiliary wheels, said means first lowering the support beneath the wheels, and then lowering the wheels beneath said sup port.

5. In a subgrade scraper, a frame, form engaging wheels therefor, transportation wheels suitably disposed thereon, and an elevating support upon which said frame is rotatable in horizontal plane.

6. In a subgrade scraper, a frame, transportation wheels on said frame, an elevating mechanism independent of said transport-ation wheels, and unitary means for concurrently positioning said transportation wheels and actuating said elevating mechanism.

7. In a subgrade scraping device, a frame, wheels for supporting said frame upon rails, other wheels for transporting said frame, and means for lifting the device from the supporting rails, said lifting means permitting of rotary displacement of the frame in a horizontal plane.

8. In a subgrade scraping device, a frame,

wheels for supporting said frame upon rails, other wheels for transporting said frame independent of said rails, means for lifting said frame from its rail support, and means concurrently actuating said frame lifting means and operably positioning said transport-ing wheels thereunder. Y 9. The combination in a subgrade scraping device, of a frame, end wheels for engaging rail supports, transportation wheels, a turntable support having a ground engaging end, and means for lowering said turntable support and said transportation wheels to operable positions beneath said frame the transportation wheels being inoperable when said frame is on rail supports and having the lowest points of their peripheries in substantially the same horizontal plane as the grounc engaging end of said turntable support when the latter is in use.

10. In subgrade scraper, a frame, form engaging wheels disposed thereon, transportation wheels. means for lifting the frame from its supporting forms. and means for opera tivelv positioning said transportation wheels after said frame has been elevated by said lifting means.

11. i In a subgrade scraping device, a frame. wheels for supporting said frame upon forms. other wheels for transporting the de vice in a direction different from to its direction of travel on forms, and means independent of said transportation wheels for lifting the device from its form support, there being intermediate said lifting means and said frame a mechanical connection permitting of rotary displacement of the frame relative to Said lifting means.

12. The combination in a subgrader scraping machine of a frame supporting cutting blades, rollers supporting the frame on guide rails, transportation wheels near the center of the frame, a turntable shoe also near the center of the frame, means for lowering and elevating said turntable shoe, means operable in unison with the meansrfor lowering and raising said turntable shoe for lowering the transportation wheels and operable while the turntable shoe is being lowered to lift the machine, and springs for aiding the lifting of the frame, said means for lowering the transportation wheels also being operable during the elevation of the turntable shoe.

13. The combination in a subgrader scraping machine of a frame supporting cutting blades, rollers supporting the frame on guide rails, transportation wheels near the center of the frame, a turntable shoe also near the center of the frame, means for lowering and elevating said turntable shoe, and means: operable in unison with the means for lowering and raising said turntable shoe for lowering the transportation wheels and operable while the turntable shoe is being lowered to lift the machine, said means for lowering the transportation wheels also being operable during the elevation of the turntable shoe.

14. The combination in a subgrader scraping machine of a frame supporting cutting blades, rollers supporting the frame on guide rails, transportation wheels near the center of the frame, a turntable shoe also near the center of the frame, means for lowering and elevating said turntable shoe, means operable in unison with the means for lowering and raising said turntable shoe for lowering the transportation wheels and operable while said turntable shoe is being lowered to lift the machine on the turntable shoe, said means for lowering the transportation wheels being operable while the turntable shoe is being raised, and means for varying the relative movement of the transportation wheels and the turntable shoe.

15. The combination in a subgrader scraping machine of a frame supporting cutting blades, rollers supporting the frame on guide rails, transportation wheels near the center of the frame, a turntable shoe also near the center of the frame, means for lowering and elevating said turntable shoe, means operable in unison with the means for lower ing and raising said turntable shoe for lowering the transportation wheels and operable while the machine is being lifted on the turncol table shoe, said means for lowering the transportation wheels also being operable while the turntable shoe is being raised, and means for varying the relative speed of the movement between the turntable shoe and the transportation wheels.

16. The combination in a subgrader scraping machine of a frame supporting cutting blades, rollers supporting the frame on guide rails, transportation wheels near the center of the frame, a turntable shoe also near the center of the frame, means for lowering and elevating said turntable shoe, means operable in unison with the means for lowering and raising said turntable shoe for lowering the transportation Wheels and operable while the machineis being lifted on the turntable shoe, said means for lowering the transportation wheels also being operable while the turntable shoe is being raised, and means for varying the operable relation of the transportation wheels and the turntable shoe whereby to vary the relative speed of movement between said turntable shoe and said transportation wheels.

EDWARD G. CARR. 

